Canada Moonseed is a native woody vine of forest edges, stream banks, and thickets across eastern North America, climbing by twining stems. It produces clusters of black, grape-like berries that are dangerously toxic — a potentially deadly confusion with wild grapes, which they closely resemble. The single crescent-shaped seed within each berry gives the plant its name. Despite human toxicity, the berries are consumed without harm by birds. The vine provides habitat for small wildlife and its flowers attract native bees.
Best time to see a Canada Moonseed
The best time to see a Canada Moonseed is April–June, when about 62% of U.S. sightings happen, based on 10,405 research-grade iNaturalist observations.
Not certain it is a Canada Moonseed? What plant is this? walks through what to check first and the lookalikes that catch people out.
Recent Canada Moonseed sightings near you
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